gridbaglayouttest.java

java GUI用户界面程序

package chapter7.layout;

import java.awt.*;
import com.borland.jbcl.layout.XYLayout;
import com.borland.jbcl.layout.*;

public class GridBagLayoutTest
    extends Frame
{
    public GridBagLayoutTest()
    {
        GridBagConstraints gbc = new GridBagConstraints(); // 使用类GridBagConstriants
        setLayout(new GridBagLayout()); //设定外观管理器为GridBagLayout外观管理器
        gbc.fill = GridBagConstraints.BOTH; //把分配的剩余空间填满

        //添加第一个按钮
        gbc.gridwidth = 1; //设置第一个按钮的大小：跨1行1列
        gbc.gridheight = 1;
        Button Button1 = new Button(" 东 ");
        ( (GridBagLayout) getLayout()).setConstraints(Button1, gbc);
        add(Button1);

        //添加第二个按钮
        gbc.gridwidth = GridBagConstraints.REMAINDER; //填满剩余的行或列
        Button Button2 = new Button(" 西 ");
        ( (GridBagLayout) getLayout()).setConstraints(Button2, gbc);
        add(Button2);

        //添加第三个按钮
        gbc.gridheight = 4; //跨4行1列
        gbc.gridwidth = 1;
        Button Button3 = new Button(" 南 ");
        ( (GridBagLayout) getLayout()).setConstraints(Button3, gbc);
        add(Button3);

        //添加第四个按钮
        gbc.gridheight = 2; //跨2行2列
        gbc.gridwidth = 2;
        Button Button4 = new Button(" 北 ");
        ( (GridBagLayout) getLayout()).setConstraints(Button4, gbc);
        add(Button4);

        //添加第5个按钮
        gbc.gridwidth = GridBagConstraints.REMAINDER;
        Button Button5 = new Button(" 中 ");
        ( (GridBagLayout) getLayout()).setConstraints(Button5, gbc);
        add(Button5);

        //添加第6个按钮
        gbc.insets = new Insets(5, 6, 7, 8);
        Button Button6 = new Button("似是故人来");
        ( (GridBagLayout) getLayout()).setConstraints(Button6, gbc);
        add(Button6);
        try
        {
            jbInit();
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }
    }

    public static void main(String[] args)
    {
        GridBagLayoutTest gridbaglayouttest = new GridBagLayoutTest();
        gridbaglayouttest.setSize(300, 300);
        gridbaglayouttest.show();
    }

    private void jbInit()
        throws Exception
    {
        this.setLayout(borderLayout1);
        this.add(list1, java.awt.BorderLayout.NORTH);
    }

    List list1 = new List();
    BorderLayout borderLayout1 = new BorderLayout();
}